Evol Ecol Res 20: 679–690 (2019)     Full PDF if your library subscribes.

The maintenance of polymorphism and divergence in sexually selected traits affected by frequency-dependent predation and consistent mating advantages

Aditya Ponkshe1,2 and John A. Endler1

1Centre for Integrative Ecology, School of Life & Environmental Sciences, Deakin University, Victoria, Australia and 2Minimal Intelligence Laboratory (MINT Lab), University of Murcia, Murcia, Spain

Correspondence: A. Ponkshe, Minimal Intelligence Laboratory (MINT Lab), University of Murcia, Murcia 30100, Spain. email: ponkshe.aditya@gmail.com


Questions: How does negative frequency-dependent natural selection (NFD) affect the maintenance and divergent fixation of polymorphic traits subject to directional mate preferences? What role does directional natural selection (DNS) on mate preferences play in these conditions when DNS is sex-limited versus when it is not?

Negative frequency-dependent selection: NFD is characterized by a decline in the relative fitness of genotype with an increase in its relative frequency or abundance in a population.

Models: We build sets of population genetic models based on the classical haploid version of the null model of sexual selection and use numerical simulations of deterministic recursions to analyse them.

Conclusions: (1) Environments with NFD weaker than mate preferences of individual female types promote the fixation of sexual traits in opposite directions than environments with NFD stronger than mate preferences. (2) Strong NFD prevents the fixation of sexual traits in opposite directions despite the strong differences in mate preferences of individual female types. (3) The Fisher process interacts with NFD identically whether DNS is sex-limited or not.

Keywords: Fisher process, frequency-dependent selection, mate choice, null model, polymorphic sexual traits, polymorphism maintenance, population divergence.

IF you are connected using the IP of a subscribing institution (library, laboratory, etc.)
or through its VPN.


        © 2019 Aditya Ponkshe. All EER articles are copyrighted by their authors. All authors endorse, permit and license Evolutionary Ecology Ltd. to grant its subscribing institutions/libraries the copying privileges specified below without additional consideration or payment to them or to Evolutionary Ecology, Ltd. These endorsements, in writing, are on file in the office of Evolutionary Ecology, Ltd. Consult authors for permission to use any portion of their work in derivative works, compilations or to distribute their work in any commercial manner.

       Subscribing institutions/libraries may grant individuals the privilege of making a single copy of an EER article for non-commercial educational or non-commercial research purposes. Subscribing institutions/libraries may also use articles for non-commercial educational purposes by making any number of copies for course packs or course reserve collections. Subscribing institutions/libraries may also loan single copies of articles to non-commercial libraries for educational purposes.

       All copies of abstracts and articles must preserve their copyright notice without modification.